[uoaei]

> number of births requiring a C-section

Slippery metric. "Requiring" seems hard to isolate vs other options like "elected to use".

[ColanR]

Yeah. If there's an evolutionary aspect to the increase, we should expect to see c-sections as a generational phenomena, and correlated with cranium size. I wonder if that study has been done.

[Normille]

>... other options like "elected to use"...

Supposedly more common as a choice amongst higher income women. Hence the phrase "Too posh to push"